Convert ARRAYSIZE_UNSAFE -> arraysize.

Source/core/loader/MixedContentCheckerTest.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/loader/MixedContentChecker.h"
 
 #include "platform/weborigin/KURL.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "wtf/RefPtr.h"
@@ skipping 13 matching lines @@
         {"http://example.com/foo", "http://example.com/foo", false},
         {"http://example.com/foo", "https://example.com/foo", false},
         {"https://example.com/foo", "https://example.com/foo", false},
         {"https://example.com/foo", "wss://example.com/foo", false},
         {"https://example.com/foo", "http://example.com/foo", true},
         {"https://example.com/foo", "http://google.com/foo", true},
         {"https://example.com/foo", "ws://example.com/foo", true},
         {"https://example.com/foo", "ws://google.com/foo", true},
     };
 
-    for (size_t i = 0; i < ARRAYSIZE_UNSAFE(cases); ++i) {
+    for (size_t i = 0; i < arraysize(cases); ++i) {
         const char* origin = cases[i].origin;
         const char* target = cases[i].target;
         bool expectation = cases[i].expectation;
 
         KURL originUrl(KURL(), origin);
         RefPtr<SecurityOrigin> securityOrigin(SecurityOrigin::create(originUrl));
         KURL targetUrl(KURL(), target);
         EXPECT_EQ(expectation, MixedContentChecker::isMixedContent(securityOrigin.get(), targetUrl)) << "Origin: " << origin << ", Target: " << target << ", Expectation: " << expectation;
     }
 }
 
 } // namespace blink